package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.redis.RedisConstant;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private SystemUserService systemUserService;

    @Override
    public CaptchaVo customCaptcha() {
        // 生成验证码图片
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        // 设置验证码类型
        specCaptcha.setCharType(SpecCaptcha.TYPE_DEFAULT);
        // 将验证码图片转换为base64
        String imageStr = specCaptcha.toBase64();
        String text = specCaptcha.text();
        //生成UUID
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString().replaceAll("-", "");
        //存储到redis中
        redisTemplate.opsForValue().set(key, text,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        //将验证码和uuid放到vo中返回
        return new CaptchaVo(imageStr, key);
    }

    @Override
    public String customLogin(LoginVo loginVo) {
        //验证码校验
        String redisCode = (String)redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (ObjectUtils.isEmpty(redisCode)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        if (!redisCode.equalsIgnoreCase(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //账号校验
        LambdaQueryWrapper<SystemUser> systemUserLambdaQueryWrapper = new LambdaQueryWrapper<>();
        systemUserLambdaQueryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(systemUserLambdaQueryWrapper);
        if (systemUser == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //密码校验
        if (!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //账号是否可用
        if (systemUser.getStatus() != BaseStatus.ENABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //生成token
        String token = JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
        return token;
    }
}
